Apple and Samsung users seem to be the only ones who really love their smartphones Right on the heels of a**ther successful quarter for Apple, J.D. Power has awarded the tech giant*with the proverbial cherry on top: its latest smartphone customer satisfaction survey puts the iPhone*maker ahead of Samsung, HTC, BlackBerry and LG on every major U.S. carrier. According to J.D. Power, customers of AT&T, Verizon, Sprint and T-Mobile are most satisfied with their iOS devices, with Samsung taking second place. It wasn't exactly a blowout for Apple though*-- on a 1,000 point scale for each carrier, Apple only beat Samsung by double digits for Sprint customers. The score was within a single point for Verizon.